A6303AE3R [AITSEMI]
CMOS LOW DROPOUT REGULATOR (LDO);
| 型号： | A6303AE3R |
| 厂家： | 
AiT Semiconductor |
| 描述： | CMOS LOW DROPOUT REGULATOR (LDO) |
| 文件： | 总15页 (文件大小：942K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
A6303A
AiT Semiconductor Inc.
www.ait-ic.com
CMOS LOW DROPOUT REGULATOR (LDO)
300mA ULTRA-LOW NOISE, ULTRA-FAST RESPONSE
DESCRIPTION
FEATURES
The A6303A is designed for portable RF and
wireless applications with demanding
performance and space requirements.
The A6303A performance is optimized for
battery –powered systems to deliver ultra low
noise and low quiescent current. Regulator
ground currentincreases only slightly in dropout,
furtherprolonging the battery life.
Ultra-low Noise for RF Application
Ultra-Fast Response in Line/Load Transient
<0.01μA Standby Current When Shutdown
Low Dropout: 210mV@300mA
Wide Operating Voltage Ranges: 2V to 6V
Wide Output Voltage Range:1.2V to 5V
TTL-logic-Controlled Shutdown Input
(SOT-25, SC70-5)
Low Temperature Coefficient
The A6303A also works with low-ESR ceramic
capacitors, reducing the amount of board space
necessary for power applications, critical in
hand-held wireless devices. The A6303A
consumes less than 0.01μA in shutdown mode
and has fast turn-on time less than 50μs. The
other features include ultra low dropout voltage,
high output accuracy,current limiting protection
and high ripple rejection ratio.
Current Limiting Protection
Thermal Shutdown Protection
Only 1μF Output Capacitor Required for Stability
High Power Supply Rejection Ratio
Custom Voltage Available
Fast output discharge
Available in SOT-23, SOT-25, SC70-5 Package
APPLICATION
The A6303A is available in SOT-23, SOT-25 and
SC70-5 Packages.
Cellular and Smart Phones
Battery-Powered Equipment
Laptop, Palmtops, Notebook Computers
Hand-Held Instruments
PCMCIA Cards
ORDERING INFORMATION
MP3/MP4/MP5 Players
Portable Information Appliances
Package Type
SOT-23
Part Number
TYPICAL APPLICATION
A6303AE3R-XXZ
A6303AE3VR-XXZ
A6303AE5R-XXZ
A6303AE5VR-XXZ
A6303AC5R-XX
A6303AC5VR-XX
E3
E5
C5
SOT-25
SC70-5
XX: Output Voltage
12= 1.2V, 25=2.5V, 33=3.3V
Z: Output Type
Note
A = A Type
NOTE: Output capacitor (C2 ≥ 2.2uF) is recommended in
A6303A-1.2V, A6303A-1.3V, A6303A-1.5V and A6303A-1.8V
application to assure the stability of circuit.
V: Halogen free Package
R: Tape & Reel
AiT provides all RoHS products
Suffix “ V “ means Halogen free Package
REV1.4
-DEC 2009 RELEASED, NOV 2011 UPDATED -
- 1 -
A6303A
AiT Semiconductor Inc.
www.ait-ic.com
CMOS LOW DROPOUT REGULATOR (LDO)
300mA ULTRA-LOW NOISE, ULTRA-FAST RESPONSE
PIN DESCRIPTION
Top View
SOT-23
A
Top View
Symbol
Top View
Function
Package
Pin Type
SOT-25
A
SC70-5
Power Input Voltage.
VIN
3
1
1
2
1
2
GND
Ground
Chip Enable Pin with two options.
Active high with internal 8mΩ pull down
Pin #
-
3
3
EN
-
2
4
5
4
5
NC
VOUT
No Connection
Output Voltage.
THERMAL RESISTANCE
Package
θJA
θJC
SOT-23
SOT-25
SC70-5
250°C/W
250°C/W
333°C/W
130°C/W
130°C/W
170°C/W
NOTE: Thermal Resistance is specified with approximately 1 square of 1 oz copper.
REV1.4
-DEC 2009 RELEASED, NOV 2011 UPDATED -
- 2 -
A6303A
AiT Semiconductor Inc.
www.ait-ic.com
CMOS LOW DROPOUT REGULATOR (LDO)
300mA ULTRA-LOW NOISE, ULTRA-FAST RESPONSE
(NOTE 1)
ABSOLUTE MAXIMUM RATINGS
VIN, Input Supply Voltage
SOT-25, SC70-5
-0.3V to +6V
-0.3V to +6.5V
-0.3V to VIN
SOT-23
EN Pin Input Voltage (SOT-25, SC70-5)
Output Voltages
-0.3V to VIN+0.3V
300mA
Output Current
Maximum Junction Temperature
SOT-25, SC70-5
150°C
125°C
SOT-23
Operating Temperature Range NOTE2
Storage Temperature Range
Lead Temperature (Soldering, 10s)
-40oC ~ 85oC
-65°C ~ 125°C
300°C
Stresses above may cause permanent damage to the device. These are stress ratings only and functional operation of the device at
these or any other conditions beyond those indicated in the Electrical Characteristics are not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device reliability.
NOTE1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
NOTE2: The A6303A is guaranteed to meet performance specifications from 0°C to 70°C. Specifications over the -40°C to 85°C
operating temperature range are assured by design, characterization and correlation with statistical process controls.
REV1.4
-DEC 2009 RELEASED, NOV 2011 UPDATED -
- 3 -
A6303A
AiT Semiconductor Inc.
www.ait-ic.com
CMOS LOW DROPOUT REGULATOR (LDO)
300mA ULTRA-LOW NOISE, ULTRA-FAST RESPONSE
ELECTRICAL CHARACTERISTICS (NOTE 1)
VIN = 3.6V, EN = VIN (SOT-25, SC70-5), CIN = COUT = 1uF, TA = 25°C, unless otherwise specified.
Parameter
Input Voltage
Symbol
VIN
Conditions
Min
Typ
-
Max
Unit
V
2
-1
-2
6
+1
+2
-
VIN = 3.6V,
Output Voltage Accuracy NOTE2
Current Limit
ΔVOUT
-
%
IOUT = 1mA
RLOAD = 1Ω
VEN > 1.2V,
IOUT = 0mA
ILIM
400
430
mA
SOT-25
SC70-5
Quiescent Current
IQ
-
90
130
μA
IOUT = 0mA
SOT-23
IOUT = 200mA, VOUT = 2.8V
IOUT = 300mA, VOUT = 2.8V
-
-
130
210
180
300
Dropout Voltage
VDROP
mV
VIN = 3.6V to 5.5V
IOUT = 1mA
Line Regulation NOTE3
ΔVLINE
-
0.05 0.17
%/V
Load Regulation NOTE4
Output Voltage NOTE5
Temperature Coefficient
ΔVLOAD 1mA < IOUT < 300mA
-
-
-
2
-
%/A
TCVOUT IOUT = 1mA
±60
ppm/oC
SOT-25
SC70-5
SOT-25
VEN = GND,
Shutdown
Standby Current
ISTBY
-
-
0.01
-
0.1
μA
EN Input Bias Current
IIBSD
VEN =GND or VIN
500
nA
SC70-5
SOT-25
SC70-5
SOT-25
SC70-5
VIN = 3V to 5.5V,
Shutdown
VIN = 3V to 5.5V,
Start up
Logic Low
EN Input
VIL
VIH
-
-
-
0.4
-
V
Threshold
Logic High
1.2
10Hz to 100KHz,
IOUT = 200mA
Output Noise Voltage
eNO
-
100
-
μVRMS
f = 217Hz
Power Supply
-78
-72
-52
165
30
f = 1KHz
PSRR
IOUT = 100mA
-
-
dB
Rejection Ratio
f = 10KHz
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
TSD
TSDHY
Shutdown, Temp increasing
-
-
-
-
oC
oC
NOTE1: 100% production test at +25℃. Specifictations over the temperature range are guaranteed by design and characterization.
NOTE2: Output voltage accuracy : ±2%.
NOTE3: Line regulation is calculated by ΔVLINE = [(VOUT1 – VOUT2) / (ΔVIN x VOUT(NORMAL))] x 100. Where VOUT1 is the output voltage when VIN
= 5.5V, and VOUT2 is the output voltage when VIN = 3.6V, ΔVIN = 1.9V, VOUT (NORMAL) = 2.8V.
NOTE4: Load regulation is calculated by ΔVLOAD = [(VOUT1 – VOUT2) / (ΔIOUT x VOUT(NORMAL))] x 100. Where VOUT1 is the output voltage when
IOUT = 1mA, and VOUT2 is the output voltage when IOUT = 300mA. ΔIOUT = 0.299A, VOUT(NORMAL) = 2.8V.
NOTE5: The temperature coefficient is calculated by TCVOUT = [ΔVOUT / (ΔT x VOUT)]
REV1.4
-DEC 2009 RELEASED, NOV 2011 UPDATED -
- 4 -
A6303A
AiT Semiconductor Inc.
www.ait-ic.com
CMOS LOW DROPOUT REGULATOR (LDO)
300mA ULTRA-LOW NOISE, ULTRA-FAST RESPONSE
TYPICAL PERFORMANCE CHARACTERISTICS
1. Output Voltabe vs. Temperature
VIN = 3.6V, CIN = COUT = 1uF
2. Quiescent Current vs. Temperature
VIN= 3.6V, CIN = COUT = 1uF
3. Dropout Voltage vs. Load Current
4. PSRR
VOUT = 2.8V(SOT-23,), CIN = COUT = 1uF
VIN = 4.2V, CIN = 1uF, COUT = 1uF X 7R
5. CE Pin Shutdown Threshold Vs. Temperature
(SOT-25, SC70-5) VIN=3.6V, CIN = COUT = 1uF
6. Current Limit Vs. Input Voltage
CIN = COUT = 1uF, VOUT=2.8V
REV1.4
-DEC 2009 RELEASED, NOV 2011 UPDATED -
- 5 -
A6303A
AiT Semiconductor Inc.
www.ait-ic.com
CMOS LOW DROPOUT REGULATOR (LDO)
300mA ULTRA-LOW NOISE, ULTRA-FAST RESPONSE
7. Load Transient Response
8. Load Transient Response
VDD=5V, VOUT=2.8V, CIN = COUT = 1uF, IOUT=1mA to 50mA
VDD=5V, VOUT=2.8V, CIN = COUT = 1uF, IOUT=1mA to 250mA
9. Line Transient Reaponse
10. Line Transient Response
VDD=4V to 5V, VOUT=2.8V, CIN = COUT = 1uF, IOUT=1mA
VDD=4V to 5V, VOUT=2.8V, CIN = COUT = 1uF, IOUT=100mA
11. Start Up (SOT-25, SC70-5)
12. CE Pin Shutdown Response (SOT-25, SC70-5)
VDD= 5V, VOUT=2.8V, CIN = COUT = 1uF, No Load
VDD= 5V, VOUT=2.8V , CIN = COUT = 1uF, No Load
REV1.4
-DEC 2009 RELEASED, NOV 2011 UPDATED -
- 6 -
A6303A
AiT Semiconductor Inc.
www.ait-ic.com
CMOS LOW DROPOUT REGULATOR (LDO)
300mA ULTRA-LOW NOISE, ULTRA-FAST RESPONSE
13. VOUT vs. VDD
VOUT = 2.8V(SOT-23), CIN = COUT = 1uF
REV1.4
-DEC 2009 RELEASED, NOV 2011 UPDATED -
- 7 -
A6303A
AiT Semiconductor Inc.
www.ait-ic.com
CMOS LOW DROPOUT REGULATOR (LDO)
300mA ULTRA-LOW NOISE, ULTRA-FAST RESPONSE
BLOCK DIAGRAM
REV1.4
-DEC 2009 RELEASED, NOV 2011 UPDATED -
- 8 -
A6303A
AiT Semiconductor Inc.
www.ait-ic.com
CMOS LOW DROPOUT REGULATOR (LDO)
300mA ULTRA-LOW NOISE, ULTRA-FAST RESPONSE
DETAILED INFORMATION
Like any low-dropout regulator, the external capacitors used with the A6303A must be carefully selected for
regulator stability and performance. Using a capacitor whose value is > 1μF on the A6303A input and the
amount of capacitance can be increased without limit. The input capactitor must be located a distance of not
more than 0.5 inch from the input pin of the IC and returned to a clean analog ground. Any good quality
ceramic or tantalum can be used for this capactitor. The capacitor with larger value and lower ESR
(equivalent series resistance) provides better PSRR and line-transient response. The output capacitor must
meet both requirements for minimum amount of capacitance and ESR in all LDOs application. The A6303A is
designed specifically to work with low ESR ceramic output capacitor in space-saving and performance
consideration. Using a ceramic capacitor whose vale is at least 1μF with ESR is > 25mΩ on the output
ensures stability. The A6303A still works well with output capacitor of other types due to the wide stable ESR
range. Output capacitor of larger capacitance can reduce noise and improve load transient response, stability,
and PSRR. The output capacitor should be located not more than 0.5 inch from the VOUT pin of the A6303A
and returned to a clean analog ground.
Enable Function (SOT-25, SC70-5)
The A6303A features an LDO regulator enable/disable function. To assure the LDO regulator will switch on;
the CE turn on control level must be greater than 1.2 volts. The LDO regulator will go into the shutdown mode
when the below 0.4 volts. For to protect the system, the A6303A have a quick discharge function. If the chip
enable function is not needed in a specific application, it may be tied to VIN to keep the LDO regulator in a
continuously on stste.
Thermal Considerations
Thermal protection limits power dissipation in A6303A. When the operation junction temperature exceeds 165
℃, the OTP circuit starts the themal shutdown function turn the pass element off. The pass element turns on
again after the junction temperature cools by 30℃.
For continue operation, do not exceed absolute maximum operation junction temperature 125℃. The power
dissipation definition in device is:
The maximum power dissipation depends on the thermal resistance of IC package, PCB layout, the rate of
surroundings airflow and temperature difference between junction to ambient. The maximum
power dissipation can be calculated by following formula：
REV1.4
-DEC 2009 RELEASED, NOV 2011 UPDATED -
- 9 -
A6303A
AiT Semiconductor Inc.
www.ait-ic.com
CMOS LOW DROPOUT REGULATOR (LDO)
300mA ULTRA-LOW NOISE, ULTRA-FAST RESPONSE
Where TJ (MAX) is the maximum operation junction temperature 125℃, TA is the ambient temperature and
the θJA is the junction to ambient thermal resistance. For recommended operating conitions specification of
A6303A, where TJ (MAX) is the maximum junction temperature of the die (125°C) and TA is the maximum
ambient temperature. The junction to ambient thermal resistance (θJ is layout dependent) for SOT-23,
A
SOT-25 package is 250°C/W, SC70-5 package is 333°C/W, on standard JEDEC 51-3 thermal test board. The
maximum power dissipation at TA = 25°C can be calculated by following formula:
The maximum power dissipation durepends on operating ambient temperature for fixed TJ (MAX) and thermal
resteance θJA. It is also useful to calculate the junction of temperature A6303A under a set of specific
conditions. In this example let the Input voltage VIN = 3.3V, the output current IOUT = 300mA and the case
temperature TA = 40℃ measured by a thermal couple during operation. The power dissipation for the VOUT
=
2.8V version of the version of the A6303A can be calculated as:
And the junction temperature, TJ, can be calculated as follows:vf
For this operating condition, TJ is lower than the absolute maximum operating junction temperature,125°C, so
it is safe to use the A6303A in this configuration.
Layout considerations
To improve ac performance such as PSRR, output noise, and transient response, it is recommended that the
PCB be designed with separate ground planes for VIN and VOUT, with each ground plane connected only at the
GND pin of the device.
REV1.4
-DEC 2009 RELEASED, NOV 2011 UPDATED -
- 10 -
A6303A
AiT Semiconductor Inc.
www.ait-ic.com
CMOS LOW DROPOUT REGULATOR (LDO)
300mA ULTRA-LOW NOISE, ULTRA-FAST RESPONSE
A6303A-2.8V(SOT-25, SC70-5) Layout Circuit
TOP Layer Layout
BOTTOM Layer Layout
REV1.4
-DEC 2009 RELEASED, NOV 2011 UPDATED -
- 11 -
A6303A
AiT Semiconductor Inc.
www.ait-ic.com
CMOS LOW DROPOUT REGULATOR (LDO)
300mA ULTRA-LOW NOISE, ULTRA-FAST RESPONSE
PACKAGE INFORMATION
Dimension in SOT-23 Package (Unit: mm)
SYMBOL
MIN
MAX
1.250
0.100
1.150
0.500
0.200
3.020
1.700
2.950
A
A1
A2
b
1.050
0.000
1.050
0.300
0.100
2.820
1.500
2.650
c
D
E
E1
e
0.950(BSC)
e1
L
1.800
0.300
0°
2.000
0.600
8°
θ
REV1.4
-DEC 2009 RELEASED, NOV 2011 UPDATED -
- 12 -
A6303A
AiT Semiconductor Inc.
www.ait-ic.com
CMOS LOW DROPOUT REGULATOR (LDO)
300mA ULTRA-LOW NOISE, ULTRA-FAST RESPONSE
Dimension in SOT-25 (Unit: mm)
Symbol
Min
Max
A
A1
A2
b
1.050
0.000
1.050
0.300
0.100
2.820
1.500
2.650
1.250
0.100
1.150
0.500
0.200
3.020
1.700
2.950
c
D
E
E1
e
0.950(BSC)
e1
L
1.800
0.300
0°
2.000
0.600
8°
θ
REV1.4
-DEC 2009 RELEASED, NOV 2011 UPDATED -
- 13 -
A6303A
AiT Semiconductor Inc.
www.ait-ic.com
CMOS LOW DROPOUT REGULATOR (LDO)
300mA ULTRA-LOW NOISE, ULTRA-FAST RESPONSE
Dimension in SC70-5 (Unit: mm)
Symbol
Min
Max
1.100
A
A1
A2
b
0.900
0.000
0.900
0.150
0.080
2.000
1.150
2.150
0.100
1.000
0.350
c
0.150
D
2.200
E
1.350
E1
e
2.450
0.650 TYP
1.400
e1
L
1.200
0.525 REF
0.460
L1
θ
0.260
0°
8°
REV1.4
-DEC 2009 RELEASED, NOV 2011 UPDATED -
- 14 -
A6303A
AiT Semiconductor Inc.
www.ait-ic.com
CMOS LOW DROPOUT REGULATOR (LDO)
300mA ULTRA-LOW NOISE, ULTRA-FAST RESPONSE
IMPORTANT NOTICE
AiT Semiconductor Inc. (AiT) reserves the right to make changes to any its product, specifications, to
discontinue any integrated circuit product or service without notice, and advises its customers to obtain the
latest version of relevant information to verify, before placing orders, that the information being relied on is
current.
AiT Semiconductor Inc.'s integrated circuit products are not designed, intended, authorized, or warranted to
be suitable for use in life support applications, devices or systems or other critical applications. Use of AiT
products in such applications is understood to be fully at the risk of the customer.
As used herein may
In order to
involve potential risks of death, personal injury, or servere property, or environmental damage.
minimize risks associated with the customer's applications, the customer should provide adequate design and
operating safeguards.
AiT Semiconductor Inc. assumes to no liability to customer product design or application support. AiT
warrants the performance of its products of the specifications applicable at the time of sale.
REV1.4
-DEC 2009 RELEASED, NOV 2011 UPDATED -
- 15 -
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